High-efficiency concave and conventional solar cell integration system using focused reflected light

Keisuke Ohdaira, Kozo Fujiwara, Wugen Pan, Noritaka Usami, Kazuo Nakajima

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A concave Si single crystal prepared by mechanical polishing was successfully processed to a solar cell with a conversion efficiency of 14.7%. The concave cell could focus its reflection to a small spot, which generated further output in a conventional Si solar cell placed at the focal point. The total efficiency of this system became as high as 16.3%. The calculation results clearly show that there is room for further improvement of the total conversion efficiency by the correspondence between the small cell area and the focused spot size as well as the increase in concentration ratio.

Original languageEnglish
Pages (from-to)1664-1667
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume45
Issue number3 A
DOIs
Publication statusPublished - 2006 Mar 8

Keywords

  • Concave mirror
  • Focused light
  • Polishing
  • Reflection
  • Solar cell

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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